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Welcome to Steemit!
For future posts, people don't say "Hi gays", instead you should write "Hi guys".

Ok,thanks very much

Also you need to learn about tags.
Tags are important because it'll help people find your post.
For introduction posts, you should have used "introduceyourself" as a tag.

I have learned about tag,but there still have a lot of things I can't understand. I will learn those things recently. The blockchain tech also so complicated,it's difficult for me.